package com.sdkj.recruit.util;

import java.security.MessageDigest;

public class WxSignatrueUtil {

	private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
			'e', 'f' };

	public static String getWxShareSignatrue(String ticket, String noStr, String url, String timestamp) {
		// char[] _ticket = ticket.toCharArray();
		// char[] _noStr = noStr.toCharArray();
		// char[] _url = url.toCharArray();
		// char[] _timestamp = timestamp.toCharArray();
		//
		// Arrays.sort(_ticket);
		// Arrays.sort(_noStr);
		// Arrays.sort(_url);
		// Arrays.sort(_timestamp);

		// String jsapi_ticket =
		// String.valueOf(_ticket)+"&noncestr="+String.valueOf(_noStr)+"&timestamp="+String.valueOf(_timestamp)+"&url="+_url.toString();

		String jsapi_ticket = "jsapi_ticket=" + ticket + "&noncestr=" + noStr + "&timestamp=" + timestamp + "&url="
				+ url;

		return new String(encode(jsapi_ticket));
	}

	private static String getFormattedText(byte[] bytes) {
		int len = bytes.length;
		StringBuilder buf = new StringBuilder(len * 2);
		// 把密文转换成十六进制的字符串形式
		for (int j = 0; j < len; j++) {
			buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);
			buf.append(HEX_DIGITS[bytes[j] & 0x0f]);
		}
		return buf.toString();
	}

	public static String encode(String str) {
		if (str == null) {
			return null;
		}
		try {
			MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
			messageDigest.update(str.getBytes());
			return getFormattedText(messageDigest.digest());
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
}
